1GMO

CRYSTAL STRUCTURES OF NK1-HEPARIN COMPLEXES REVEAL THE BASIS FOR NK1 ACTIVITY AND ENABLE ENGINEERING OF POTENT AGONISTS OF THE MET RECEPTOR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.254 

wwPDB Validation 3D Report Full Report


This is version 2.0 of the entry. See complete history

Literature

Crystal Structures of Nk1-Heparin Complexes Reveal the Basis for Nk1 Activity and Enable Engineering of Potent Agonists of the met Receptor

Lietha, D.Chirgadze, D.Y.Mulloy, B.Blundell, T.L.Gherardi, E.

(2001) Embo J. 20: 5543

  • DOI: 10.1093/emboj/20.20.5543
  • Primary Citation of Related Structures:  1GMN

  • PubMed Abstract: 
  • NK1 is a splice variant of the polypeptide growth factor HGF/SF, which consists of the N-terminal (N) and first kringle (K) domain and requires heparan sulfate or soluble heparin for activity. We describe two X-ray crystal structures of NK1-heparin c ...

    NK1 is a splice variant of the polypeptide growth factor HGF/SF, which consists of the N-terminal (N) and first kringle (K) domain and requires heparan sulfate or soluble heparin for activity. We describe two X-ray crystal structures of NK1-heparin complexes that define a heparin-binding site in the N domain, in which a major role is played by R73, with further contributions from main chain atoms of T61, K63 and G79 and the side chains of K60, T61, R76, K62 and K58. Mutagenesis experiments demonstrate that heparin binding to this site is essential for dimerization in solution and biological activity of NK1. Heparin also comes into contact with a patch of positively charged residues (K132, R134, K170 and R181) in the K domain. Mutation of these residues yields NK1 variants with increased biological activity. Thus, we uncover a complex role for heparan sulfate in which binding to the primary site in the N domain is essential for biological activity whereas binding to the K domain reduces activity. We exploit the interaction between heparin and the K domain site in order to engineer NK1 as a potent receptor agonist and suggest that dual (positive and negative) control may be a general mechanism of heparan sulfate-dependent regulation of growth factor activity.


    Organizational Affiliation

    Growth Factors Group, MRC Centre, Hills Road, Cambridge CB2 2QH, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HEPATOCYTE GROWTH FACTOR
A, B, C, D, E, F, G, H
183Homo sapiensGene Names: HGF (HPTA)
Find proteins for P14210 (Homo sapiens)
Go to Gene View: HGF
Go to UniProtKB:  P14210
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EPE
Query on EPE

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H
4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID
HEPES
C8 H18 N2 O4 S
JKMHFZQWWAIEOD-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, C, D, E, F, H
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
SGN
Query on SGN

Download SDF File 
Download CCD File 
A, B, C, F, G
N,O6-DISULFO-GLUCOSAMINE
C6 H13 N O11 S2
DQTRACMFIGDHSN-UKFBFLRUSA-N
 Ligand Interaction
IDS
Query on IDS

Download SDF File 
Download CCD File 
A, B, C, F, G
2-O-sulfo-alpha-L-idopyranuronic acid
O2-SULFO-GLUCURONIC ACID
C6 H10 O10 S
COJBCAMFZDFGFK-VCSGLWQLSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.254 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 179.700α = 90.00
b = 174.100β = 90.00
c = 59.900γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
AMoREphasing
CNSrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-10-02
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 2.0: 2017-07-12
    Type: Advisory, Atomic model, Derived calculations